Am I correct in saying that profits from a prop firm are 1099-m income and not considered short term capital gains ?
If they are a BD, and you get a K1 because you are a partner, you're earnings should be 60% capital gains and 40% ordinary income.
Trade futures/forex can get 60/40 LT/ST split regardless of holding period. Trade equities, hold for more than a year get 100% LT cap gains.